Dinesh has been hired to paint the numbers 1 through 100 on 100 apartments

Dinesh has been hired to paint the numbers 1 through 100 on 100 apartments. How many times will he have to paint the digit 8?

1. 10

2. 20

3. 19

4. 1

Correct Option: Option B,

20

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0 to 9 one 8, 10 to 19 two 8's continuing in same fashion we will have eight 8s' upto 79. From 80 to 89 we have 11 8s' because 88 has 2 8's. Now from 90 to 100 we have on extra 8. Therefore in total we have 8 + 11 + 1 = 20 8's.